In Safari/Chrome on a Mac, tooltip font for Docked Thumbnails & Control Bar is serif (Times or similar) but sans serif (Helvetica or similar) on Chrome on a PC. Not sure whether this is a bug or whether it's related to the individual browser/computer settings. In any case, would be useful to have a <Font> option added to <Show tooltips> in the Docked Thumbnails & Control Bar settings – will add this as a feature request.

If needed you can have a look on yourtour_core.xml (for default tooltips) and on yourtour_skin.xml (for plugins) files to look after tooltips <layer> (html5) and <textstyle> (flash) to change the font used, the color, etc ...

Yes, there are a few issues and a heap of black holes but as far as I know, an update is imminent.. Not sure if Alexandre J has to sign off on an new updates before they are made available, but he is at the NAB...